Stainless Steel Belleville Washers | SS Disc Spring Washers | Conical Washers | Coned Disc Springs
Manufacturer–Exporter from India of Stainless Steel Belleville Washers
Overview
We are a leading manufacturer and exporter of Stainless Steel Belleville Washers, also known as SS Disc Spring Washers, Conical Washers, Coned Disc Springs, and Belleville Disc Springs, from India. Our Belleville washers are precision-pressed from high-quality stainless steel strip in grades SS 301, SS 304, SS 316, SS 316L, SS 17-7PH, and PH 15-7Mo, offering outstanding load capacity, corrosion resistance, and spring fatigue life. We supply standard DIN 2093, ISO 16983, and ASME-compliant Belleville washers as well as fully custom-engineered conical disc springs for valve loading, preload applications, bolted joint maintenance, and vibration isolation across oil and gas, chemical, nuclear, marine, automotive, and aerospace sectors.
What Are Belleville Washers?
A Belleville washer (also called a disc spring, conical spring washer, or coned disc spring) is a type of spring formed in the shape of a truncated cone. When loaded axially, the cone deflects and stores elastic energy, generating a spring force that maintains preload over time, compensates for thermal expansion, and prevents bolt loosening in dynamic or high-temperature environments. Related terms include: Belleville spring washers, disc spring packs, conical lock washers, coned washers, spring disc washers, clamping spring washers, heavy-duty disc springs, stainless Belleville discs, preload washers, and anti-loosening conical washers.
Material Grades & International Equivalents
| Grade | AISI | EN/DIN | UNS | Key Property |
|---|---|---|---|---|
| SS 301 | AISI 301 | 1.4310 | S30100 | High spring-back, cold-work hardened |
| SS 304 | AISI 304 | 1.4301 | S30400 | General corrosion resistance |
| SS 316 | AISI 316 | 1.4401 | S31600 | Marine / chloride environments |
| SS 316L | AISI 316L | 1.4404 | S31603 | Low carbon, weld-free sensitisation |
| SS 17-7PH | — | 1.4568 | S17700 | High strength, aerospace grade |
| SS 15-7Mo | — | 1.4532 | S15700 | Ultra-high strength, fatigue resistant |
| Duplex 2205 | — | 1.4462 | S32205 | High-stress, oil and gas applications |
Other materials available: carbon steel (DIN CK67, 50CrV4), copper-beryllium (C17200), phosphor bronze (C51000).
Types of Belleville Washers Available
We manufacture: Standard Belleville Disc Springs (DIN 2093 Series A, B, C), Belleville Disc Spring Stacks (parallel, series, and combination configurations), Slotted Belleville Washers (reduced load, increased deflection), Serrated Belleville Washers with internal or external serrations for anti-rotation, Ribbed / Crinkle Belleville Washers, Heavy-Duty Conical Disc Springs for press, die, and hydraulic applications, and Custom-Profile Disc Springs to special OD/ID/height/load per drawing.
Design & Engineering Capabilities
Our spring engineers use FEA-backed Belleville washer calculations per DIN 2093 and ISO 16983. Load-deflection curves are computed for single, parallel, and series stacks. Fatigue life is calculated per DIN 2093 Group 1, 2, 3 (up to 10 million cycles). Custom design parameters: OD from 6 mm to 250 mm, ID from 3.2 mm to 130 mm, thickness (t) from 0.2 mm to 14 mm, free height (h₀) from 0.4 mm to 25 mm, and load at 75% deflection from 10 N to 1,500,000 N. Tooling uses precision-hardened tool steel dies with OD/ID concentricity ≤ 0.05 mm.
Technical Specifications
| Parameter | Typical Range |
|---|---|
| OD Range | 8 mm – 200 mm |
| Thickness Range | 0.4 mm – 12 mm |
| Hardness (SS 301) | 35–48 HRC spring temper |
| Spring Load Tolerance | ±10% per DIN 2093 standard |
| Flatness (unloaded) | ≤ 0.1% of OD |
| Temperature Range | -200°C to +300°C (SS 316); up to 450°C with Inconel |
| Standard | DIN 2093, ISO 16983, ASME, BS 5759 |
| Surface Finish | Phosphated, shot-blasted, oiled, or plain |
Applications & Industries
Oil & Gas (valve stem packing springs, flange bolt preload, wellhead equipment), Chemical Processing (corrosive-media valve disc springs, reactor flange sealing), Nuclear (highly regulated disc spring assemblies for containment flanges), Marine & Offshore (deck fittings, hatch clamps, seawater-resistant springs), Power Generation (turbine bolt preload, steam valve springs), Automotive (clutch pack disc springs, transmission clamping, brake systems), Aerospace (actuator preload springs, landing gear, seat locking mechanisms), Heavy Engineering (press tooling ejector springs, die clamping systems), and Electronics (PCB connector preload, switch actuation springs).
ISO Certification & Quality Assurance
We are an ISO 9001:2015 certified. Belleville washer quality controls include: OD, ID, free height, and thickness measured on CMM and optical comparator, spring load verification at specified deflection on calibrated spring tester, Rockwell C hardness on every batch, EN 10204 3.1 Mill Certificates and XRF PMI material verification, visual inspection plus dye penetrant testing on heavy-duty series, and DIN 2093 compliance statement. PPAP Level 2 and 3 available on request.
Frequently Asked Questions
Q1. What is the difference between a Belleville washer and a standard spring washer?
A standard split helical spring (lock) washer is designed primarily to resist fastener rotation. A Belleville washer is a precision-engineered conical disc spring that stores significantly higher elastic energy, maintains bolt preload over large deflection ranges, and is used in engineered spring systems — not just anti-loosening applications.
Q2. Can I stack Belleville washers for higher load or greater deflection?
Yes. Stacking in parallel (same orientation) multiplies load. Stacking in series (alternating orientation) multiplies deflection. Combination stacks give intermediate characteristics. Our engineers can calculate and supply pre-assembled Belleville stacks to your required load and deflection.
Q3. Which stainless steel grade is best for marine Belleville washers?
SS 316 or SS 316L is recommended for seawater and high-chloride environments due to molybdenum content providing superior pitting and crevice corrosion resistance. For severely corrosive media, Duplex 2205 or Hastelloy C276 variants are available.
Q4. What is the maximum operating temperature for stainless steel Belleville washers?
SS 316 Belleville washers maintain spring properties up to approximately 300°C continuous operation. For higher temperatures up to 450°C, we supply in SS 310 or Inconel 718. Please specify operating temperature in your enquiry.
Q5. Do you manufacture serrated Belleville washers for anti-rotation?
Yes. We produce both internal and external serrated Belleville washers that bite into the mating surface to prevent rotation and vibration-induced loosening — widely used in automotive, rail, and heavy equipment applications.
Q6. What is your lead time for custom Belleville washers?
For standard sizes we maintain stock or can supply within 2–3 weeks. For custom-profile disc springs, tooling and first-article approval typically takes 4–6 weeks, with production thereafter on a regular schedule.
Why Choose us for Belleville Washers?
Engineering expertise in DIN 2093 and ISO 16983 disc spring design | In-house spring load testing and CMM inspection | Export to 40+ countries including oil and gas, nuclear, and aerospace sectors | Competitive pricing: USD 2–25/piece depending on size and grade | Full material certification: EN 10204 3.1 MTC, RoHS, REACH | Custom stacks and special profiles available.
Get an Engineering Quote for Stainless Steel Belleville Washers
Provide your OD, ID, thickness, free height, required load, quantity, and operating environment — our spring engineers will respond within 24 hours with a DIN 2093 calculation sheet and competitive quote. Email: sales@cableglandsindia.com | Phone: +91 22 4344 9300. Request a disc spring calculation, download our DIN 2093 data sheet, or get a quote today.